buffer
Description
Returns an expanded geometry region (or shrunken, if the buffer distance is negative) of the supplied geometry, called a buffer, using the supplied distance and resolution. If the supplied geometry contains holes, then a positive-distance buffer will extend into those holes.
Messages
The following table lists the request and response messages for the buffer operation.
Click on a message name to get more information about the message.
| Message | Description |
|---|---|
| BufferRequest | The request message for the buffer operation. |
| BufferResponse | The response message for the buffer operation. |
Troubleshooting
The XML returned by the Geometry Service for buffer requests can contain multiple polygons (exterior and interior), not just a single polygon. The XML namespaces can help you determine that this is the case. For instance, the appearance of <ns2:Exterior> and <ns2:InteriorList> within an XML response indicates that a buffer contains multiple polygons. When the returned XML is visualized, you can see a self-intersecting polygon.If you do not parse out these elements, a polygon will be displayed that looks like this:
Once parsed, the polygon should look like this:
